<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>样式控制</title>
    <style>
        /*边框*/
        input{
            outline: none;
        }

        /*div 块级元素*/

        /*元素控制*/

        span{
           /* display: block;*/
            display: none;
            width: 300px;
        }
    </style>
</head>
<body>
<input type="text" /><br>
<span>坤坤1</span>
<span>坤坤2</span>
<span>坤坤3</span>
<span>坤坤4</span>


</body>
</html>